From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261893AbVGKOrN (ORCPT ); Mon, 11 Jul 2005 10:47:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261890AbVGKOpE (ORCPT ); Mon, 11 Jul 2005 10:45:04 -0400 Received: from mx2.elte.hu ([157.181.151.9]:61830 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S261893AbVGKOnx (ORCPT ); Mon, 11 Jul 2005 10:43:53 -0400 Date: Mon, 11 Jul 2005 16:43:28 +0200 From: Ingo Molnar To: Alistair John Strachan Cc: linux-kernel@vger.kernel.org Subject: Re: Realtime Preemption, 2.6.12, Beginners Guide? Message-ID: <20050711144328.GA18244@elte.hu> References: <200507061257.36738.s0348365@sms.ed.ac.uk> <20050711141232.GA16586@elte.hu> <20050711141622.GA17327@elte.hu> <200507111538.22551.s0348365@sms.ed.ac.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200507111538.22551.s0348365@sms.ed.ac.uk> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Alistair John Strachan wrote: > It's annoying that this is so readily reproducible here, yet almost > impossible to debug, and clearly a sideaffect of 4KSTACKS.. without it > actually being a stack overflow. > > I realise 4KSTACKS is a considerable rework of the IRQ handler, etc. > and probably even more heavily modified by rt-preempt, but is there > nothing else that can be tested before a serial console run? 4K stacks never really caused any trouble under PREEMPT_RT (or any other kernel i tried). It's not that complex either. one useful thing could be to give me exact instructions on how to set up an openvpn network similar to yours, and what kind of workload to generate. Maybe i can reproduce it here. Ingo